What is the UUID / GUID Generator?
A UUID (Universally Unique Identifier) or GUID (Globally Unique Identifier) is a 128-bit label used to uniquely identify information in computer systems. This free online tool generates Version 4 UUIDs using secure, cryptographic random number generators directly in your browser. It is incredibly fast and allows developers to bulk generate up to 1000 unique keys instantly for databases, APIs, or software testing.
How to generate UUIDs in bulk
Generating bulk UUIDs is seamless. Simply enter the number of UUIDs you need in the input field—you can request anywhere from a single identifier up to 1000 at once. Click the Generate button, and the tool will instantly output a list of valid v4 UUIDs separated by new lines. You can then use the one-click copy button to copy the entire list to your clipboard and paste it directly into your code editor, database seeder, or spreadsheet.
Is crypto.randomUUID() secure?
Yes, this tool leverages the modern Web Crypto API (specifically `crypto.randomUUID()` where available, or a fallback to `crypto.getRandomValues()`) to ensure the highest level of cryptographic randomness. Unlike simple `Math.random()` scripts which are highly predictable, this native browser API guarantees true randomness, making the chance of a collision (generating the same UUID twice) virtually zero. Furthermore, because it runs 100% locally on your machine, no data is ever sent to a server, guaranteeing complete privacy for your application identifiers.